Add docs for Keyboard and Touch libraries, which will probably be in v0.7.1 or something.
Add docs for the Either library, Touch.taps, and the new Maybe API.
Add some new examples.
Switch from (<~) to lift to be less confusing to newcomers.
Add docs for new functions and to clarify behavior.
Update docs for Prelude.
Merge branch 'master' of https://github.com/evancz/elm-lang.org

Conflicts:
	public/examples/Reactive/ZipCodes.elm
Add examples for Dict, Set, Either, and Touch libraries.
Add comments about how to get the touch examples working and add links to them from /Basic.elm.
Add the beginnings of the 0.7.1 announcement.
Update latest version announcement.
Reformat some general pages.
Fix bug with `mergeEither`.
Simplify the MovingBox example.
Change examples on home page.
Update Pong overview.
Fix some examples.
Minify RTS and add warning to 0.7.1 announcement about needing a touch device.
Fixes for announcement.
fixed (||) typo